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Raman scattering investigation with temperature of the phase transitions in (Pb0.825Ba0.175)ZrO3 and (Pb0.65Ba0.35)ZrO3 ceramics |
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| Authors: | I El-Harrad P Becker C Carabatos-Nédelec J Handerek Z Ujma D Dmytrow |
| Institution: | a Centre Lorrain d'Optique et Electronique des Solides, Université de Metz et Supélec, Technopôle de Metz 2000, 2 Rue Edouard Belin, 57078, Metz Cedex 3, France b Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007, Katowice, Poland |
| Abstract: | Raman scattering investigations of lead-barium zirconate are presented for two barium concentrations, as a function of temperature from 10 to 450 K. An order-disorder phase transition is observed at 130 K for the low barium concentration, for which an antiferroelectric-ferroelectric phase transition is equally observed at 308 K and a ferroelectric-paraelectric one at 433 K. The ceramic containing a high barium concentration is in a ferroelectric state up to 403 K, above this temperature begins the paraelectric phase of the material. The order parameters of the two types of transitions, order-disorder and antiferroelectric-ferroelectric, are evaluated. |
| Keywords: | Raman spectrometry Raman scattering Ceramics Lead-barium zirconates Phase transitions |
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